علوم زیستی دریا
Somayeh Zangeneh; Solmaz Kakeshian; Solmaz Shirali; Ahmad Savari; Hossein Najafzadeh Varzi; Abdolali Movahedinia; Mohammad Zakeri
Abstract
The present study has performed to investigate the effects of different levels of soy and garlic phytoestrogens on ovarian structure in Yellowfin seabream (Acanthopagrus latus). A total of 105 Yellowfin seabream were divided in seven groups including a control group that were received standard ...
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The present study has performed to investigate the effects of different levels of soy and garlic phytoestrogens on ovarian structure in Yellowfin seabream (Acanthopagrus latus). A total of 105 Yellowfin seabream were divided in seven groups including a control group that were received standard food without any extract and six treatment groups that were received different doses of soy (2/5, 5 and 7/5%) and garlic (0/5, 1 and 2%) hydroalcoholic extract. Fish were fed daily at a rate of 3% of body weight twice for 14 days. Sampling was done in days of 0, 7, 10 and 14. In every time, a section of mid portion of gonad was cut for histological examination. The results showed that different doses of soy and garlic phytoestrogens have various effects on growth and development of gonad in Yellowfin seabream as a protandrous hermaphrodite fish, so that increase in dose and time of consumption of food containing garlic hydroalchoholic extract cause increase in number of vitellogenesis follicles and finally growth and development of ovary, while consumption of food containing soy hydroalcoholic extract cause observing of testis and immature ovaries containing previtellogenesis follicle and prevents gonad development from testis to ovary in protandrous hermaphrodite fish.
Mehdi Bolouki; SMohammad Bagher Nabavi; Ahmad Savari; Ehsan Tavasolpor; Monir Haghighat
Volume 12, Issue 1 , April 2013, , Pages 106-113
Abstract
Coral reefs which are one of the most significant marine ecosystems have symbiosis with zooxanthella for their growth and survival. Today zooxanthella and coral symbiosis is in the danger of anthropogenic and global climate changes. A better understanding of the mitosis cycle of the cell in symbiotic ...
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Coral reefs which are one of the most significant marine ecosystems have symbiosis with zooxanthella for their growth and survival. Today zooxanthella and coral symbiosis is in the danger of anthropogenic and global climate changes. A better understanding of the mitosis cycle of the cell in symbiotic algae leads to a quantitative assessment of stress in corals and a clear presentation of the effect of the relationship between mitotic division and pollutants. To conduct this study in the first investigation, the best concentration of live coral reefs was selected by using Manta Tow method. The coral sampling of the region was conducted by scuba diving from dominant genus of the region through one year in three seasons including cold, moderate and warm season. By extracting zooxanthella with air brush machine, counting the dividing zooxanthella under microscope and forming a simple proportion to the total counted zooxanthella mitotic index was obtained. Eventually it was determined that mitotic index has significant alteration between warm and cold season with moderate season.